O-Alkyl-S-n-propyl-N-sulfonyl-phosphoric acid ester amides

Abstract

O-Alkyl-S-n-propyl-N-sulfonyl-phosphoric acid ester amides of the formula ##STR1## in which R 1 is methyl or ethyl, R 2 is C 1 -C 6 alkyl or alkenyl, C 1 -C 6 alkyl substituted by aryl, phenyl, C 1 -C 6 alkylphenyl, or halophenyl R 3 is C 1 -C 6 alkyl, C 1 -C 6 alkyl substituted by halogen, phenyl, C 1 -C 6 alkylphenyl, C 1 -C 6 alkoxyphenyl, halophenyl, or nitrophenyl, and X is oxygen or sulfur, Which possess insecticidal, acaricidal and nematicidal properties.

What is claimed is: 
     
       1. An O-alkyl-S-n-propyl-N-sulfonyl-phosphoric acid ester amide of the formula ##STR375## in which R 1  is methyl or ethyl, R 2  is C 1  -C 6  alkyl or alkenyl, C 1  -C 6  alkyl substituted by aryl, phenyl, C 1  -C 6  alkylphenyl, or halophenyl, and   R 3  is C 1  -C 6  alkyl, C 1  -C 6  alkyl substituted by halogen, phenyl, C 1  -C 6  alkylphenyl, C 1  -C 6  alkoxyphenyl, halophenyl, or nitrophenyl.   
     
     
       2. A method of combating insects, acarids or nematodes, which comprises applying to the insects, acarids, or nematodes, or to a habitat thereof an insecticidally, acaricidally or nematicidally effective amount of a compound according to claim 1. 
     
     
       3. A compound according to claim 1, in which R 2  is alkyl having 1 to 4 carbon atoms, allyl, benzyl, phenyl or phenyl carrying one or two substituents selected from chlorine and methyl, and R 3  is alkyl having 1 to 4 carbon atoms, chloromethyl, phenyl or phenyl carrying one to three substituents selected from chlorine, bromine, methyl, methoxy and nitro. 
     
     
       4. The compound according to claim 1, wherein such compound is O-ethyl-S-n-propyl-N-methyl-N-methanesulfonylphosphoramidodithioate of the formula ##STR376## 
     
     
       5. An insecticidal, acaricidal or nematicidal composition containing as active ingredient an insecticidally, acaricidally or nematicidally effective amount of a compound according to claim 1 in admixture with a diluent. 
     
     
       6. The method according to claim 2, in which said compound is O-ethyl-S-n-propyl-N-methyl-N-methanesulfonylphosphoramidodithioate.